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Preparation and Magnetism of ZnO Crystals Codoped with Co and Sn

Zhang Xiao-jun

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Abstract

In this paper,cobalt(Co) and tin(Sn)-doped ZnO crystals have been synthesized by hydrothermal method with 6 mol/L KOH as mineralizer,meanwhile,the mixture of SnO2,CoCl2 and ZnO(mol ratio is 0.02:0.5:1) as precursor.The fill factor was 70% and kept the reaction temperature of 430 ℃ for 24 h.Sn-doped has significantly changed the polar growth characteristics of the crystals.Surface of {0001} was exposed largely,cylindrical face {1010},positive pyramid face {1011},negative pyramidal face {101-1-},negative polar face {0001},positive pyramidal face {1012} and negative pyramidal face {101-2-} were also exposed.The size of the crystals was about 50 μm.It was found that Co element in the crystals reached 10.89at% and a small amount of Co oxide appeared in the product through EDS characterization.SQUID test showed that the samples were mainly paramagnetic.

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What this paper is about

In this paper,cobalt(Co) and tin(Sn)-doped ZnO crystals have been synthesized by hydrothermal method with 6 mol/L KOH as mineralizer,meanwhile,the mixture of SnO2,CoCl2 and ZnO(mol ratio is 0.02:0.5:1) as precursor.The fill factor was 70% and kept the reaction temperature of 430 ℃ for 24 h.Sn-doped has significantly changed the polar growth characteristics of the crystals.Surface of {0001} was exposed largely,cylindrical face {1010},positive pyramid face {1011},negative pyramidal face {101-1-},negative polar face {0001},positive pyramidal face {1012} and negative pyramidal face {101-2-} were also exposed.The size of the crystals was about 50 μm.It was found that Co element in the crystals reached 10.89at% and a small amount of Co oxide appeared in the product through EDS characterization.SQUID test showed that the samples were mainly paramagnetic.

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Available abstract

In this paper,cobalt(Co) and tin(Sn)-doped ZnO crystals have been synthesized by hydrothermal method with 6 mol/L KOH as mineralizer,meanwhile,the mixture of SnO2,CoCl2 and ZnO(mol ratio is 0.02:0.5:1) as precursor.The fill factor was 70% and kept the reaction temperature of 430 ℃ for 24 h.Sn-doped has significantly changed the polar growth characteristics of the crystals.Surface of {0001} was exposed largely,cylindrical face {1010},positive pyramid face {1011},negative pyramidal face {101-1-},negative polar face {0001},positive pyramidal face {1012} and negative pyramidal face {101-2-} were also exposed.The size of the crystals was about 50 μm.It was found that Co element in the crystals reached 10.89at% and a small amount of Co oxide appeared in the product through EDS characterization.SQUID test showed that the samples were mainly paramagnetic.

Key concepts: Materials science, Tin, Hydrothermal circulation, Doping, Cobalt, Tin oxide, Pyramid (geometry), Polar

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